• 文献标题:   Field-Induced Kosterlitz-Thouless Transition in the N=0 Landau Level of Graphene
  • 文献类型:   Article
  • 作  者:   NOMURA K, RYU S, LEE DH
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007
  • 通讯作者地址:   Tohoku Univ
  • 被引频次:   60
  • DOI:   10.1103/PhysRevLett.103.216801
  • 出版年:   2009

▎ 摘  要

At the charge neutral point, graphene exhibits a very unusual high-resistance metallic state and a transition to a complete insulating phase in a strong magnetic field. We propose that the current carriers in this state are the charged vortices of the XY valley-pseudospin order parameter, a situation which is dual to a conventional thin superconducting film. We study energetics and the stability of this phase in the presence of disorder.